Journal "Gyroscopy and Navigation" /  Books  
   "Gyroscopy and Navigation" №4 (43), 2003
 
 

CONTENTS

V.G.Peshekhonov Gyroscopes in the beginning of XXI century 5
Considered is gyro development in the 20th century, the state-of-the-art of gyro techniques and inertial navigation. The work executed by A.Yu.Ishlinsky in the field of gyro mechanics are analyzed, and his contribution to the development of inertial navigation in our country is shown.
O.A.Babich, O.I.Fedoskin Joint solution of aerospace navigation problems and Earth surface monitoring using the Earth frame 19
The task of processing of the joint data coming from earth surface monitoring system, digital topographical map and reconnaissance plane's navigation system processing is considered. Mathematical expressions connecting these signals in view of earth's reference-ellipsoid geometry are developed. They may be used for the following tasks decision: to topographical map of new founded targets, to reconnaissance plane's navigation system correct and to draw earth surface image on the pilot's cockpit when in limited visibility conditions flight.
Ja.I.Binder, T.V.Paderina Strapdown inertial measuring units: compassing and calibration under restriction of angular movements 29
The paper gives investigation into variants of solving a problem of determining coefficients of angular velocity transducer (AVT) drift model, and determining accelerometer zero errors and similar parameters of an inertial measuring unit (IMU) with fixed values of azimuth and zenith angle. Here the type of inertial sensors being used is not stipulated. It is shown that for these two basic and practically significant cases of IMU angular motion restriction there is the possibility of efficient compassing and determination of all substantial AVT and IMU parameters without standardization in azimuth. Analysis is made of how main assumptions about a type of the model under identification and calibration procedure conditions influence on compassing results. The conclusion is made about expediency of developing the inertial mode of strapdown stabilized gyrocompass calibration in conditions of anchorage with change of bearings.
E.A.Izmailov On the unified approach to the analysis of sources of inside electromechanical disturbances in inertial measuring converters 40
A main error in inertial measuring transducers (IMT), that determines inertial navigation system's errors, is a zero signal or drift. For widely used electrome-chanical IMTs, internal electromechanical disturbances essentially contribute to a general error. The paper analyses physical nature of mechanisms that generate these disturbances for three different types of gyros and accelerometers of the considered IMT group. There were floating, magnetic suspended spherical, hemispherical gyros and a dry pendulum compensational accelerometer. Based on developed structural diagrams of error generation for each of the mentioned devices, a generalized structural diagram has been formed, that reveals the commonality of their functional ingredients and error generation mechanisms. This allowed to formulate a common methodological approach to the analysis of internal electromechanical disturbance sources for the whole electromechanical IMT group.

Brief  notes

V.Z.Gusinsky, Yu.A.Litmanovich Accuracy Improvement of the Spacecraft Attitude Determination by the ESG/FOG Data Fusion 50
Investigated are advantages of introducing fiber-optic gyros (FOG) into the attitude control system of low-orbit satellites, based on strapdown electrostatic gyros (SESG). It is shown that when differences of attitude control parameters, calculated by the data of various gyro groups, are used as measurements, two problems can be solved, which are typical for systems under consideration. One of them consists in necessity to smooth the noise of the electrooptical system, measuring angular position of SESG rotor, for increasing accuracy of terrestrial objects observation. The other problem consists in determining error angles between installation bases of SESG and a star scanner with a view to increase efficiency of SESG periodical correction by stars. In this paper formulated are the general principles of SESG and FOG data integration, and expressions are derived for difference measurement signals. These expressions are the basis for development of an algorithm of optimal estimation. Presented are the results of testing the prototype of one measurement channel on the one-coordinate dynamical testbed using the suboptimal estimation algorithm. The results show the efficiency of the method suggested.

Materials of the 10th Saint Petersburg International Conference
on Integrated Navigation Systems

V..Hertzman, V.V.Dvorkin,
V.P.Ivanov, A.M.Petushkov, A.V.Ekalo
Development of trajectory measurement systems based on GPS/GLONASS signals 59
A system of external trajectory measurements for determining motion parameters of carrier rockets and space boosters is considered. The system includes: the on-board navigation equipment for GLONASS/GPS signal users, ground-based reference stations, hardware/software systems of data processing. The paper presents: the peculiarities of the on-board equipment embodiment; the hardware implementation of systems for data processing in computing centers of spaceports and at data users; the principal methods of navigation problem solution, systematic measurement error correction, determination of trajectory parameters realized in the software.
O.Mezentsev, J.Collin, G.Lachapelle Vehicular navigation in urban canyons using high sensitivity GPS receiver augmented with a medium-grade IMU 73
This paper investigates the augmentation of a high sensitivity GPS receiver with a medium-grade IMU and a map-matching technique. Results show that with the use of a HS GPS receiver it is possible to initialize the IMU while driving in an urban canyon and with the addition of a map-matching technique it is possible to reliably match the street the vehicle is currently on.
Yu.Ikeda, Ba Nguyen, J. Panagos Simulation Validation for an automatic air collision avoidance system in preparing for flight test 85
This paper presents performance evaluation of an algorithm for an Automatic Air Collision Avoidance System (Auto ACAS or simply ACAS) that has been developed by the U.S. Air Force and its Swedish counter part, Forsvaret Materielverk (FMV). The algorithm uses the optimal coordinated escape maneuvers to avoid mid-air collision, while satisfying the imposed system requirements. In addition, the algorithm can simultaneously accommodate multiple aircraft in a collision course by activating the coordinated escape maneuvers. It also allows close formation flight and rejoin without activating the escape maneuver when certain conditions are met. The algorithm uses GPS and Navigational System for the universal time and position information. This information is exchanged through a data link between the in-netwrok neighboring aircraft to detect collision potentials, select the optimal escape maneuver, and execute the optimal escape maneuver when the collision becomes imminent. The algorithm has its own integrity management system to operate safely against failures and GPS / data link dropout. The functionality of the algorithm has been tested through layers of simulation evaluation with flight simulators. With the improvements made based on pilots' comments who flew the simulator, the algorithm is now nearly ready for flight test.
G.Thin Sperwer UAV and its integrated system for navigation, guidance and stabilization 89
Like combat aircraft's, certain tactical UAVs make use of advanced techniques for their navigation. Navigation applied to UAVs provides vital assistance to flight in every phase of their mission. It has to operate in place of usual pilot appreciation, because the pilot is absent. This kind of situation is new; it changes conventional requirements to airborne navigation systems, but also solutions brought to these requirements.

Materials of the 5th conference of young scientists
Navigation and Motion Control

Paper abstracts
99

Materials of the 23th Conference in memory of N.N.Ostryakov

Article

B.V.Gryazev, D.M.Malyutin,
V.V.Saveliev, V.A.Smirnov
Dynamics research for the two-axis stabilization and guidance system considering the influence of technological errors and way of its accuracy increasing 126
The two-axis of stabilization and guidance (SS&G) (Eqs.1) is considered. Results of computer simulation of SS&G dynamic errors at influence of various negative factors (fig.2) are given. The way to increase SS&G accuracy by compensation of the moments of viscous friction and the moments inertial character (Eqs.6, 10) working on system is offered. The influence of an intertance of executive drives and sensors of system of indemnification on efficiency of its work (fig.6 - 8) is estimated. Formulas for estimation efficiency of compensation in function swinging frequency of the basis, intertance of drives and sensors of the circuit of compensation (Eqs.8, 9) are received.

Brief  note

Ya.N.Bershtam, D.A.Serpinsky, E.D.Shevtsova Experience of test bench creation for marine oscillation modeling on the base of computer-controlled digital servo drives 136
Presented are the characteristics of the digital-controlled test bench for ship motions modeling. The main user parameters of the test bench are listed.

International Public Association
The Academy of Navigation and Motion Control
Official information

The 16th General meeting of the Academy of Navigation and Motion Control    139    

Pages of history

V.G.Peshekhonov Admiral Anatoly Ivanovich Rassokho and evolution of marine inertial navigation 141

New books

Yu.A.Solovjev "Satellite navigation and its applications"    146    

Information

O.A.Stepanov
European control conferences
147    
65 years with Elektropribor (to the anniversary of LMNS)
154    
Russian and international conferences, symposiums and exhibitions
155    
Abstracts of the papers published
157    
List of materials published in journal Gyroscopy and Navigation in 2003
161    

The abstracts of the papers presented here
are available in Russian and English
at http://www.elektropribor.spb.ru (Section "Publications")
 
 
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Last updated January 20, 2004